My Corolla car needs a couple of new tyres - I put four new Firestone Firehawk TZ100 on a few years back, at the recommendation of Consumer magazone. The front have worn out, back still looking good. They're 195 60 15 size.

I can't find my last receipt for tyres, it's before I started scanning receipts. I got some kind of a discount but can't remember what. Looking around online it seems the prices are secret - that suggests to me there are massive margins in the tyre business and they're trying to screw as much money out of you as possible. I don't like having to call up or email to get a price, in all my businesses prices are online.

What should I be paying for a set of 195 60 15 TZ100 tyres? List price is around $170 I think, but I've found a grabone deal for $89 each. The TZ700 is their replacement, but the TZ100 will be fine if they're cheaper.

The firestone's have been fine but interested to hear if anyone has any opinions on brands or models.

NOTE - PLEASE READ THIS BEFORE POSTING: I don't need "tyres are important" advice, I know that. I'm not looking for cheap tyres. I'm interested in what good quality tyres should cost given there's so much difference between advertised prices and what the tyres are occasionally sold for.